Python + Falcon + OpenTelemetry: Not sending traces to OTEL Collector

Question

I am trying to instrument my Falcon app to send traces to OTEL Collector. I am doing auto-instrument via launch command and then trying to send traces like the following:

OTEL_RESOURCE_ATTRIBUTES=service.name=terminus OTEL_EXPORTER_OTLP_TRACES_ENDPOINT='http://otel-collector:4317' OTEL_EXPORTER_OTLP_ENDPOINT='http://otel-collector:4317' OTEL_EXPORTER_OTLP_PROTOCOL=grpc OTEL_EXPORTER_OTLP_INSECURE=true opentelemetry-instrument gunicorn -c conf.py

And then added these libraries in my app:

opentelemetry-distro = "0.43b0"
opentelemetry-exporter-otlp = "1.22.0"
opentelemetry-instrumentation-falcon = "0.43b0"

However, I am getting the following error:

Transient error StatusCode.DEADLINE_EXCEEDED encountered while exporting traces to otel-collector:4317, retrying in 1s.

I am running all this in docker-compose and my config for OTEL Collector looks like:

receivers:
  otlp:
    protocols:
      grpc:
        endpoint: 0.0.0.0:4317
      http:
        endpoint: 0.0.0.0:4318

exporters:
  otlp:
    endpoint: jaeger-all-in-one:4317
    tls:
      insecure: true

processors:
  batch:

extensions:
  health_check:
  pprof:
    endpoint: :1888
  zpages:
    endpoint: :55679

service:
  extensions: [pprof, zpages, health_check]
  pipelines:
    traces:
      receivers: [otlp]
      processors: [batch]
      exporters: [otlp]